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MCB3020 USF Exam 2 Practice Questions and Answers 100% Verified
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MCB3020 USF Exam 2 Practice Questions and Answers 100% VerifiedMCB3020 USF Exam 2 Practice Questions and Answers 100% VerifiedMCB3020 USF Exam 2 Practice Questions and Answers 100% VerifiedMCB3020 USF Exam 2 Practice Questions and Answers 100% Verified ______ in the DNA helix provide DNA binding p...

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  • August 13, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • mcb3020 usf exam 2 practice questions and answers
  • mcb3020 usf exam 2 practice answers
  • gene transfer from parent to child is called exp

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MCB3020 USF Exam 2 Practice
Questions and Answers 100% Verified
Gene transfer from parent to child is called:
expression
horizontal transmission
vertical transmission
transformation
recombination - ANSWER - Vertical transmission


______ in the DNA helix provide DNA binding proteins access to base sequences buried in the
center of the molecule so that proteins can interact with the bases without the strands being
separated:
cohesive ends
grooves
nicks
attractions
repulsions - ANSWER - Grooves


The nucleoids of bacteria and most archaea, as well as the nuclear DNA of eukaryotes, are kept
__________ supercoiled:
positively
neutrally
negatively
reverse
extra - ANSWER - negatively


Supercoiling in bacteria is typically introduced by an enzyme called:
gyrase
helicase

,ligase
polymerase
endonuclease - ANSWER - gyrase


Positive supercoils are produced in the DNA during transcription. The cell deals with them using:
RNA polymerase
topoisomerases
DNA polymerase
sigma factor
DNA ligase - ANSWER - topoisomerases


Bacteria are capable of __________ transmission—the transfer of genetic information from one
cell to another.
vertical
horizontal
recombination
transformation
pseudogene - ANSWER - horizontal


Bacterial translation differs from eukaryotic in that the growing peptide chain requires ATP for
adding new amino acids instead of GTP
True or False - ANSWER - False


An operon is a polycistronic sequence that codes for:
One transcript
multiple protein products
one protein product
A and C
A and B - ANSWER - A and B
Which of the following modifications can occur to proteins after translation?
attachment of AMP

, removal of methionine
cleavage of part of the protein
A and B
A B and C - ANSWER - ABC


This antibiotic affects translation of the bacteria by preventing translocation of the ribosome:
actinomycin D
penicillin
tetracycline
rifamycin B
fusidic acid - ANSWER - fusidic acid


Rho-dependent terminatation of transcription relies on a series of 4-5 consecutive uracil
residues for the termination process.
True or False - ANSWER - False- Rho-independent termination


Without _____, the core RNA polymerase binds and releases DNA at random:
shine-Dalgamo sequence
a sigma factor
a peptidytransferase
an initiation factor - ANSWER - a sigma factor


Actinomycin D binds to the bacterial holoenzyme and inhibits transcription
True or False - ANSWER - False; blocks elongation


Rifamycin B selectively binds to the bacterial holoenzyme and inhibits transcription
True or False - ANSWER - True


What is the significance of the Shine-Dalgarno sequence?
It is the site where..

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